*Morimasa Takata1, Satoshi Otsuka1, Yoshitsugu Sone2, Eiji Hosono3, Daisuke Asakura3, Hirofumi Matsuda3, Minoru Umeda1
(1. Nagaoka University of Technology, 2. Japan Aerospace Exploration Agency, 3. National Institute of Advanced Industrial Science and Technology)
Keywords:氷点下, リチウムイオン二次電池, 性能低下